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VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN='8th ECIC & 9th ICSTI 2022':MAILTO:info@ecic-icsti.com
LOCATION:Room „Lloyd“
SUMMARY:High blast temperature study of large blast furnace stove in SHOUGANG
DESCRIPTION:The energy consumption in iron-making process accounts for the main part of the total energy consumption in iron and steel industry, which is the focus of iron and steel energy conservation. Hot blast stove technology and blast temperature in China have greatly improved after more than ten years introduction, digestion and absorption, and independent innovation, but there has been a decline in recent years. According to the basic methods to improve blast temperature, the relationship between theoretical combustion temperature, preheating temperature and calorific value of gas is discussed. Through the comparison of domestic and foreign technologies such as blending high calorific value gas, preheating by heat exchanger, preheating by hot blast stove itself and preheating by high temperature air combustion, etc. It is clarified that high blast temperature of 1250 ~ 1300 ℃ has been achieved by adopting the double preheating technology of air and gas with high temperature preheating furnace on the hot blast stove of large blast furnace. In combination with the problems of cracking of furnace shell, deformation of corrugated compensator and corrosion of gas pipe network in the hot blast stove of JINGTANG No. 2 blast furnace(5500m3) in recent years, measures such as controlling the top temperature, surface temperature and displacement monitoring of expansion joints are taken to improve the blast temperature. Through comparison of main blast furnace indexes before and after raising the blast temperature in 2014 and 2016, it is shown that the blast temperature has picked up somewhat in recent years and the energy consumption level has decreased. The research on blast temperature uniformity shows that the method of stabilizing blast temperature can effectively improve the average blast temperature. The influence of parameters such as the temperature of combustion-supporting air before and after raising the blast temperature, the preheating temperature of gas, the calorific value, the flow rate, the dome, the blast temperature and the smoke exhaust temperature on raising the blast temperature were emphatically studied. At the same time, it is pointed out that there is a technical problem to realize high blast temperature for a long time and there is a long way to go. 
CLASS:PUBLIC
DTSTART:20220830T165000
DTEND:20220830T171500
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